Removing The Piston - Gilera 2008 MSS Nexus User Manual

Engine

Removing the piston

- Install piston and wrist pin onto the connecting
rod, aligning the piston arrow the arrow facing to-
wards the exhaust.
- Fit the wrist pin snap ring onto the appropriate
tool
- With opening in the position indicated on the tool
S = left
D= right
- Place the wrist pin snap ring into position using a
punch
- Fit the wrist pin snap ring using the plug as shown
in the figure
N.B.
THE TOOL FOR INSTALLING THE STOP RINGS MUST BE
USED MANUALLY.
CAUTION
USING A HAMMER MIGHT DAMAGE THE STOPS' HOUS-
ING.
Specific tooling
020454Y Pin lock fitting tool
Choosing the gasket
- Provisionally fit the piston into the cylinder, without any base gasket.
- Assemble a dial gauge on the specific tool.
Specific tooling
020428Y Piston position check support
- Using an abutment plane, reset the comparator
with a preload of a few millimetres.
- Finally fix the comparator.
- Check the perfect sliding of the feeler pin.
- Install the tool on the cylinder without changing
the comparator position.
- Lock the tool using the original head fixing nuts.
- Rotate the crankshaft up to the TDC (the inver-
sion point of the dial gauge rotation)
- Measure the deviation from the reset value.
ENG - 130
MSS Nexus 300 i.e. E3 ( 2008)